The p2m_teardown function in arch/arm/p2m.c in Xen 4.4.x through 4.6.x allows local guest OS users with access to the driver domain to cause a denial of service (NULL pointer dereference and host OS crash) by creating concurrent domains and holding references to them, related to VMID exhaustion.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Xen | Xen | 4.4.0 (including) | 4.4.0 (including) |
| Xen | Xen | 4.4.0-rc1 (including) | 4.4.0-rc1 (including) |
| Xen | Xen | 4.4.1 (including) | 4.4.1 (including) |
| Xen | Xen | 4.4.2 (including) | 4.4.2 (including) |
| Xen | Xen | 4.4.3 (including) | 4.4.3 (including) |
| Xen | Xen | 4.4.4 (including) | 4.4.4 (including) |
| Xen | Xen | 4.5.0 (including) | 4.5.0 (including) |
| Xen | Xen | 4.5.1 (including) | 4.5.1 (including) |
| Xen | Xen | 4.5.2 (including) | 4.5.2 (including) |
| Xen | Xen | 4.5.3 (including) | 4.5.3 (including) |
| Xen | Xen | 4.6.0 (including) | 4.6.0 (including) |
| Xen | Xen | 4.6.1 (including) | 4.6.1 (including) |
| Xen | Ubuntu | devel | * |
| Xen | Ubuntu | esm-infra/xenial | * |
| Xen | Ubuntu | trusty | * |
| Xen | Ubuntu | wily | * |
| Xen | Ubuntu | xenial | * |
References
- http://www.debian.org/security/2016/dsa-3633
- http://www.securityfocus.com/bid/91015
- http://www.securitytracker.com/id/1036035
- http://xenbits.xen.org/xsa/advisory-181.html
- http://www.debian.org/security/2016/dsa-3633
- http://www.securityfocus.com/bid/91015
- http://www.securitytracker.com/id/1036035
- http://xenbits.xen.org/xsa/advisory-181.html